Journal
SURFACE & COATINGS TECHNOLOGY
Volume 362, Issue -, Pages 90-96Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2019.01.065
Keywords
Superhydrophobic; Robust; Diatomaceous earth; Nonfluorinated
Funding
- National Nature Science Foundation of China [51607067]
- Beijing Natural Science Foundation [3174058]
- Fundamental Research Funds for the Central Universities [2017MS149]
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The utilization of fluorinated chemicals and the lack of mechanical robustness have become the two main obstacles for the practical applications of the superhydrophobic coating. In this work, we created a super-robust and nonfluorinated superhydrophobic coating through the combination of paint + adhesive method and hierarchical structure method. The microscale diatomaceous earth (DE) together with sand powders contributed to hierarchical structure, which was further bonded by the Portland cement to improve robustness. The nonfluorinated triethoxyoctylsilane was adapted to offer low surface energy. Particularly, the as-prepared sample could withstand the sandpaper abrasion for 18.00 m under 24.50 kPa, tape peeling 80 times under 24.50 kPa, and heat treatment at 150 degrees C for 24 h without losing superhydrophobicity. Furthermore, this super hydrophobic material exhibits excellent self-cleaning properties.
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